Drugs can be found anywhere in the world. Many people of our society are addicted to drugs. It's a dark side of our world. A lot of people use drugs for recreational use. There are many addictive drugs available. For instance, Narcotic is a very popular drug, which is a strong pain killer and also gives a psychological relief. Every year there's an increase in addictive drug users and this is a grave matter of concern. These kinds of addictive drugs give a feeling of excitement and euphoria for a certain period but actually ruin the health to the extreme. Many dangerous drugs are available in the market. Given below is the list of five most dangerous drugs to use.

Starting in reverse order…

Ketamine C: A powerful hallucinogen – referred as Special K. This drug causes a lost of sense and identity. The effect can last for two hours maximum. But the drug can still affect the body for up to 24 hours. This drug is a powder, usually snorted, but is sometimes sprinkled on tobacco and marijuana and smoked. Special K is frequently used with other drugs like Marijuana and Heroin.

Street Methadone: Methadone can work as a pain killer. A powerful medication, it is a part of a group of drugs called Opioids. It is available in tablets and also as injectable liquid. Overdosing of Methadone is very dangerous. Methadone does not produce the euphoric rush like other drugs. So people who are addicted by Heroin or OxyContin often take large quantities of Methadone duo to the unavailability of those particular drugs. This is extremely dangerous. Methadone overdoses are associated with severe respiratory depression, decrease in heart rate and blood pressure, coma, and death.

Cocaine : Cocaine is a highly powerful drug of abuse. It gives a feeling of supremacy. The various ways of taking Cocaine are snorting, injecting and smoking. It appears that compulsive cocaine use may prove to be more dangerous if the substance is smoked rather than snorted. Smoking allows extremely high doses of Cocaine to reach the brain very quickly and results in an intense and immediate high. Cocaine often refers as Snow, Flake, Coke and Blow. Physical effects of Cocaine use include constricted peripheral blood vessels, dilated pupils, and increased body temperature, heart rate, and blood pressure. Some cocaine users report feelings of restlessness, irritability, and anxiety, both while using and between periods of use. High doses of Cocaine can cause paranoia. Combination of Cocaine and Alcohol is deadly. It creates a third substance called Cocaethylene, which intensifies the effect and can cause sudden death.

LSD （Lysergic Acid Diethylamide） : LSD is a semisynthetic psychedelic drug, which is very addictive and dangerous. This is a odourless, colourless drug that tastes slightly bitter. Often LSD is added to absorbent paper and divided into small decorative squares – with each square representing one dose. LSD users experience vast array of hallucinations, which can be very dangerous. Usually effects of the drug start after 30 to 90 minutes from taking. The physical effects include dilated pupils, higher body temperature, increased heart rate and blood pressure, sweating, loss of appetite, sleeplessness, dry mouth, and tremors.

Heroin: Heroin is the most dangerous drug available. It is derived directly from Opium poppy. Heroin usually appears as a white or brown powder. Many users take Heroin for intense euphoric effects. It is a strong pain killer. It is taken by snorting and injecting. Street names associated with Heroin are Smack, 'H', Skag and Junk. Heroin abuse is extremely dangerous for the health. Long-term effects of heroin include collapsed veins, infection of the heart lining and valves, abscesses, cellulitis, and liver disease. Pulmonary complications, including various types of pneumonia, may result from the poor health condition of the abuser, as well as from heroin's depressing effects on respiration.

We need a drug free world. Every year hundreds of people die because of using dangerous drugs. This article is written to aware people of these dangerous drugs and their killing effects. There are many more dangerous and extremely harmful drugs available in our society and we need to guard ourselves against those harmful substances. Drug is not a solution for any problem. Say No to drug and Yes to Life.

药品随处可得。社会上许多人对药成瘾，世界因此变得阴暗。许多人把药当成毒品使用（recreational use 并非字面上的娱乐用途，即指毒品使用）.许多使人成瘾的药品随处可得。比如，麻醉药就是一种很流行的药品，具有很强的止痛能力，带给人心理上的放松，每年对药成瘾的人数都在增加，这不得不引起人们的重视。这类成瘾药品带给人一时兴奋，飘飘欲仙的感觉，其实会对身体造成极大的伤害。市场上有许多危险的药品，数以下五种最危险。

从弱到强顺序…

克他命C:一种强力的致幻剂，一般叫做K仔。这种药品会使人失去感觉和辨认能力。其药效持续的最长时间为两个小时。但药效还能影响身体达二十四小时之久。此药为粉末状，一般以鼻吸的方式服用，但有时候可加在烟草和大麻里吸食。K仔通常跟其他药品，比如大麻和海洛因同时吸食。

美沙酮："美沙酮可做止痛药使用。是一种强效药，是鸦片类药品的一种，以药片和注射型液体的形式出现。过量服用美沙酮非常危险。美沙酮跟其他药品不同不会给人突然的快感。所以那些对海洛因和奥斯康定上瘾的人常服用大量美沙酮因为这类特别的药品不易到手，这是相当危险的，过量的美沙酮会严重抑制呼吸，降低心率，血压，导致昏厥甚至死亡。

可卡因：可卡因是一种滥用的强效药品。能带给人至高无上的快感。可卡因的使用方式多种，鼻吸，注射，吸食。结果表明强制性可卡因吸食比起鼻吸要更危险。吸食的方式会让大剂量的高浓度可卡因迅速到达大脑。可卡因也叫Snow（颜色）, Flake（外型）, Coke （取其音和其意，可口）and Blow（黑话）.可卡因的身体影响包括限制外围血管，瞳孔扩大，体温上升，心跳加快，血压升高。还有些可卡因使用者在使用时和使用过程中会有不知疲倦感，兴奋，焦躁。高剂量可卡因能导致幻想症。可卡因和酒精一起混合足以致命因为会产生第三种物质古柯乙碱，这会加强药效并导致猝死。

LSD（麦角酸酰二乙胺）:LSD是一种半合成致幻剂药品，极易上瘾，极端危险。这是一种无色，无味，微带苦味的药。LSD一般放在吸水纸上分成漂亮的方块形--每一个方块表示一份。LSD使用者会感觉到多种幻觉，非常危险。一般来说其药效在服用后30到90分钟起作用。药物的身体影响有瞳孔放大，体温上升，心跳加快，血压升高，出汗，失去胃口，无睡意，口干，颤抖。

海洛因：海洛因是五毒之首。它是从罂粟提炼出来的。海洛因的外观通常为白色或褐色粉末。许多使用海洛因者会产生极端的欣快感。海洛因是一种强效止痛药。其服用方式为鼻吸和注射。俗名叫Smack（取迷幻之意）,"H"（首字母）,Skag（香烟头，即指海洛因）,Junk.海洛因对身体的伤害极为严重，其长期影响包括，收缩血管，影响心脏血管和心瓣膜，溃疡，蜂窝组织炎，导致肝病。肺部并发症，包括因为滥用者健康状况恶化患上各种类型的肺炎，和呼吸道疾病。

我们需要一个无毒害的世界。每年由于使用危险药品而导致数百人丧命。这篇文章旨让大家了解这些危险的药品和他们致命的药效。社会上还有许多更危险，有害的药品。我们须洁身自好远离有害物质。药并非包治百病。拒绝毒品，尊重生命。

备注：文中drug（英文药，毒品都用此词，本文初衷还是强调先是药品才是毒品，而中国也常有毒，药乃一家的说法）.另外笔者曾翻译过国家地理频道的一部关于世界上最危险的毒品的DVD,其称五毒之首为Methamphetamine（甲级安非他命，脱氧麻黄碱）俗称冰毒，之所以列为五毒之首因为它极易到手，甚至可以从某些感冒药中提取，价格便宜，服用后会有迷幻的感觉，二战中日本最先使用用以麻醉那些日本兵。即使在冰天雪地中也不觉得冷。